Amazon cloud elb mgmt

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Hi,

I am new to awx. I am able to create credential for AWS and add dynamic inventory that only pulls instance details.
I would like to gather facts for other objects as well from AWS for example elb. For that as per documentation I need to create custom credential type with injector and create credential. Then I can run playbook using those variables.
I am not able to do this as documentation lacking examples and how to use variables in playbook. If I don’t use host information in playbook, awx can’t see those files from bitbucket repo.
Please help. It would be great if someone can share everything with screenshots.

Thanks,
Harshal